Searches for lepton number violation and resonances in K± → πμμ decays at the NA48/2 experiment

5th Symposium on Prospects in the Physics of Discrete Symmetries

Peruzzo, Letizia^1

Johannes Gutenberg University, Mainz, Germany^1

关键词: Final state;    Lepton number violations;    Lepton-number-violating decay;    Upper limits;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/873/1/012019/pdf
DOI  :  10.1088/1742-6596/873/1/012019

来源: IOP

【 摘 要 】

The NA48/2 experiment at CERN collected in 2003-2004 a large sample of charged kaon decays with multiple charged particles in the final state. A new upper limit on the rate of the lepton number violating decay K±→ πμ±μ±obtained from this sample is reported. Searches for two-body resonances in the K±→ πμμ decays (including heavy neutral leptons and inflatons) in the accessible range of masses and lifetimes are presented.